linux-kernel - Re: [PATCH 2/2] devfreq: exynos4: Support initialization of freq_table and max

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Date:	Fri, 24 Aug 2012 10:28:26 +0900
From:	jonghwa3.lee@...sung.com
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Mike Turquette <mturquette@...com>,
	Xiaoguang Chen <chenxg@...vell.com>
Subject: Re: [PATCH 2/2] devfreq: exynos4: Support initialization of freq_table
 and max_state of devfreq's profile.

On 2012년 08월 24일 07:22, Rafael J. Wysocki wrote:
> On Thursday, August 16, 2012, Jonghwa Lee wrote:
>> This patch initializes freq_table and max_state of devfreq's profile.
>> They will be used for creating transition table.
>>
>> Signed-off-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
> Does that depend on [1/2]?
>
> Rafael

Not exactly, but it shows that required procedure for using function
included in patch[1/2].


Thanks.

>
>> ---
>>  drivers/devfreq/exynos4_bus.c |   30 +++++++++++++++++++++++++++++-
>>  1 files changed, 29 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c
>> index 88ddc77..9c08855 100644
>> --- a/drivers/devfreq/exynos4_bus.c
>> +++ b/drivers/devfreq/exynos4_bus.c
>> @@ -985,7 +985,8 @@ static __devinit int exynos4_busfreq_probe(struct platform_device *pdev)
>>  	struct busfreq_data *data;
>>  	struct opp *opp;
>>  	struct device *dev = &pdev->dev;
>> -	int err = 0;
>> +	int err = 0, i;
>> +	unsigned int *freq_table;
>>  
>>  	data = kzalloc(sizeof(struct busfreq_data), GFP_KERNEL);
>>  	if (data == NULL) {
>> @@ -1042,6 +1043,33 @@ static __devinit int exynos4_busfreq_probe(struct platform_device *pdev)
>>  
>>  	platform_set_drvdata(pdev, data);
>>  
>> +	switch (data->type) {
>> +	case TYPE_BUSF_EXYNOS4210:
>> +		freq_table = devm_kzalloc(&pdev->dev, sizeof(unsigned int) * EX4210_LV_NUM,
>> +					GFP_KERNEL);
>> +
>> +		for (i = 0; i < EX4210_LV_NUM; i++)
>> +			freq_table[i] = exynos4210_busclk_table[i].clk;
>> +
>> +		exynos4_devfreq_profile.max_state = EX4210_LV_NUM;
>> +		break;
>> +	case TYPE_BUSF_EXYNOS4x12:
>> +		freq_table = devm_kzalloc(&pdev->dev, sizeof(unsigned int) * EX4x12_LV_NUM,
>> +					GFP_KERNEL);
>> +
>> +		for (i = 0; i < EX4x12_LV_NUM; i++)
>> +			freq_table[i] = exynos4x12_mifclk_table[i].clk;
>> +
>> +		exynos4_devfreq_profile.max_state = EX4x12_LV_NUM;
>> +		break;
>> +	default:
>> +		dev_err(dev, "Cannot determine the device id %d\n", data->type);
>> +		err = -EINVAL;
>> +		goto err_opp_add;
>> +	}
>> +
>> +	exynos4_devfreq_profile.freq_table = freq_table;
>> +
>>  	busfreq_mon_reset(data);
>>  
>>  	data->devfreq = devfreq_add_device(dev, &exynos4_devfreq_profile,
>>
> --
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